The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/ucontext.h

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    1 /*-
    2  * Copyright (c) 1999 Marcel Moolenaar
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer 
   10  *    in this position and unchanged.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * $FreeBSD: releng/6.2/sys/i386/include/ucontext.h 107521 2002-12-02 19:58:55Z deischen $
   29  */
   30 
   31 #ifndef _MACHINE_UCONTEXT_H_
   32 #define _MACHINE_UCONTEXT_H_
   33 
   34 typedef struct __mcontext {
   35         /*
   36          * The first 20 fields must match the definition of
   37          * sigcontext. So that we can support sigcontext
   38          * and ucontext_t at the same time.
   39          */
   40         int     mc_onstack;             /* XXX - sigcontext compat. */
   41         int     mc_gs;                  /* machine state (struct trapframe) */
   42         int     mc_fs;
   43         int     mc_es;
   44         int     mc_ds;
   45         int     mc_edi;
   46         int     mc_esi;
   47         int     mc_ebp;
   48         int     mc_isp;
   49         int     mc_ebx;
   50         int     mc_edx;
   51         int     mc_ecx;
   52         int     mc_eax;
   53         int     mc_trapno;
   54         int     mc_err;
   55         int     mc_eip;
   56         int     mc_cs;
   57         int     mc_eflags;
   58         int     mc_esp;
   59         int     mc_ss;
   60 
   61         int     mc_len;                 /* sizeof(mcontext_t) */
   62 #define _MC_FPFMT_NODEV         0x10000 /* device not present or configured */
   63 #define _MC_FPFMT_387           0x10001
   64 #define _MC_FPFMT_XMM           0x10002
   65         int     mc_fpformat;
   66 #define _MC_FPOWNED_NONE        0x20000 /* FP state not used */
   67 #define _MC_FPOWNED_FPU         0x20001 /* FP state came from FPU */
   68 #define _MC_FPOWNED_PCB         0x20002 /* FP state came from PCB */
   69         int     mc_ownedfp;
   70         int     mc_spare1[1];           /* align next field to 16 bytes */
   71         /*
   72          * See <machine/npx.h> for the internals of mc_fpstate[].
   73          */
   74         int     mc_fpstate[128] __aligned(16);
   75         int     mc_spare2[8];
   76 } mcontext_t;
   77 
   78 #if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
   79 struct mcontext4 {
   80         int     mc_onstack;             /* XXX - sigcontext compat. */
   81         int     mc_gs;                  /* machine state (struct trapframe) */
   82         int     mc_fs;
   83         int     mc_es;
   84         int     mc_ds;
   85         int     mc_edi;
   86         int     mc_esi;
   87         int     mc_ebp;
   88         int     mc_isp;
   89         int     mc_ebx;
   90         int     mc_edx;
   91         int     mc_ecx;
   92         int     mc_eax;
   93         int     mc_trapno;
   94         int     mc_err;
   95         int     mc_eip;
   96         int     mc_cs;
   97         int     mc_eflags;
   98         int     mc_esp;                 /* machine state */
   99         int     mc_ss;
  100         int     mc_fpregs[28];          /* env87 + fpacc87 + u_long */
  101         int     __spare__[17];
  102 };
  103 #endif
  104 
  105 #endif /* !_MACHINE_UCONTEXT_H_ */

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